Numerical Computation of Free Surface Weir Flow Using Isoparametric Finite Elements
Numerical computation of flows with a free surface boundary involves three problems in one: the internal flow problem, location of the free surface and the actual flow rate. The development...
Model Study of the Guadalupe River Bypass Culvert
A hydraulic model investigation of proposed channel improvements for the Guadalupe River Channel was conducted at the US Army Engineer Waterways Experiment Station in Vicksburg, Mississippi....
Accelerating Electrons
At a wastewater treatment plant in Miami, five scientists have pointed a 1.5 million v `e-beam' at pathogens and hazardous chemicals. It's the only full-scale...
Analysis of Local Scouring
An understanding of local scouring is very important for the safety and integrity of hydraulic structures. The location, shape, and magnitude of the scour hole is a function of dynamic...
Performance Characteristics of Compound Weirs
A theory is outlined which helps to explain the flow over compound weir under free overfall conditions. Experiments on twelve weirs of three sets with different dimensions are shown to...
Hydraulics of Side-Channel Weirs for Regional Detention Basins
Side-channel weirs can be used for diversion to reduce flood peaks. A 1:25 scale model was built to investigate the hydraulic characteristics of embankment-shaped side-channel weirs. Results...
Numerical Prediction of the Turbulent Flow with a Free Surface for 3-Dimensional Situation
An efficient finite-difference method, the HH-SIMPLE, has been developed that is based on a new concept of hydraulic pressure with two additional equations concerning the water surface...
A Water Quality Impact Analysis of a Hydropower Facility
A low-head hydropower generating facility has been proposed at an existing dam site on a river. The state environmental agency has required an environmental evaluation into the potential...
Murray?Commissioning Maxi Hydro with Mini Flow
The Murray Hydroelectric Project contains two of the largest pit turbines in the world. An existing dam constructed for navigation and flood control on the Arkansas River, Lock and Dam...
Hydro on Hold
Hydropower projects have become the target of a growing environmental movement overseas. The tradeoff between clean, renewable energy and the possible environmental impacts of the reservoirs...
Movable Dam?Gate Selection Procedure
Very few new dams are now being considered, particularly for waterpower and even more specifically for low head waterpower in the lower reaches of major rivers. The City of Harrisburg,...
Pit Turbine Technology for Low Head Hydro Projects
Manufacturers of hydro generating equipment have developed designs that are adaptable to existing dams and suitable for upgrading and redevelopment of existing hydro plants. The pit turbine...
Visual Estimates of Flume and Weir Operating Conditions
Laboratory studies were conducted on a rectangular broad-crested weir to determine the effects of entrance and exit conditions on the prediction of discharge and required energy loss....
Kankakee Dam Discharge Characteristics
The low-head dam on the Kankakee River has flashboards which are installed as the discharge decreases in early summer, to maintain the upstream pool level. In response to concern over...
Scour Downstream of the Straight Drop Spillway
Tests made to determine the effect of high tailwater and long duration flows on scour downstream of the straight drop spillway stilling basin are presented in this paper. Results are presented...
Discharge Characteristics of Rectangular Profiled Weirs
This paper contains the results of a detailed experimental program carried out to define the discharge characteristics of rectangular profiled weirs. The flow region where the discharge...
Modeling Side-Weir Diversions for Flood Control
Side-channel weirs can be used for diversion to reduce flood peaks. This study has developed a means for incorporating the effects of side weirs in HEC-1 and HEC-2 calculations through...
Effects of Semi-Impoundment on Fish and Crustacean Nursery Use: Evaluation of a Solution
Semi-impoundment of the marsh is one of the primary 'solutions' currently recommended to combat coastal marsh erosion, and also to improve habitat for waterfowl,...
Long Crested Weirs
A method has been developed to integrate and evaluate the head relationship between canal weirs and turnouts. The objective is to minimize flow variations through the turnout and at the...
Low Head Dam Safety Studied with Hydraulic Models
Use of physical models to study the hydraulic jump or submerged roller action created as water overflows low head dams provides an opportunity to develop design criteria for various structure...
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